Gas and air mixer.



W. B. MUSORLEY.

GAS AND AIR MIXER.

APPLIOATION rILnn nu s1, 1913.

Patented Aug. 4, 1914,

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UNITED l rS'IJIES PATENT OFFICE.

WILLIAM B. MCSORLEY, 0F ST. LOUIS, MISSOURI, ASSIGNOR-TO MAJESTICMANUFAC- TURING COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION.

GAS AND AIIElt MIXER.

Specification of Letters Patent.

Patented Aug. 4, 1914.

Application lled May 31, 1913. Serial No. 770,949.

To all whom 'it may concern Be it known that I, WILLIAM B. MOSOR- LEY, acitizen of the United States of America, and a resident of the city ofSt. Louis, in the State of Missouri, have invented certain new anduseful Improvements in Gas and Air Mixers, of which the following is afull, clear, and exact description, reference being. had to theVaccompanying drawings, forming a part of this specification.

My invention relates to a device in which gas and air maybe mixedprevious to the delivery to a fuel gas burner, and it has for its objectthe production of a device of this kind by which the properproportionate quantities of air and gas may be brought together andmingled without fluctuation in the delivery, and with consequentcomplete combustion of the gas and air mixture; the device providingfurtherA against back firing of the gas and air mixture from the burnerto the mixing chamber.

Figure I is a vertical section through my gas and air mixer, a burnercommunicating with the mixing chamber being shown in dotted lines. Fig.II is a horizontal section taken on line II-IL Fig. I.

In the accompanying drawings A designates a fuel gas burner such as maybe supplied with a mixture of gas and air derived in a gas and air mixerconstructed in accordance with my invention.

1 designates the vertical mixing leg of my gas and air mixer, this legcontaining `an up-duct 2 the upper end of which communicates with theburner A.

3 is Va vertical air delivery leg arallel with the mixing leg l andcontaming a down-duct 4, this duct being o en to the atmosphere at itsupper end an communieating at its lov'ver end by a port 5 with the lowerend of the up-duct 2 in the leg 1.

6 designates a gas conducting pipe attached to the lower end of themixer leg 1. This pipe has connected to it a nipple 7 which extendsvertically in the mixing leg 1 and through the orifice 8 of which thegas delivered to the nipple from the conducting pipe is directed in an uward course through the mixing leg. T e nipple 7 is preferably locatedcentrally in the up-duct of the mixing leg and preferably extends abovethe port 5 furnishing communication between the air delivery down-ductand the up-duct in the mixing leg. The le s 1 and 3 are integrallyconnected toget er and closed at their lower ends, said legs beingsubstantially4 8-shaped in cross-section, and the portv -5 being formedat the lower end pf a partition wall common to both of said egs.

In the practical use of my gas and air mixer, the gas discharged fromthe nipple 7 is directed in an upward course in the upduct 2 in themixer leg 1 and, as a consequence, a suction is created in said up-ductand also in the down-duct 4 of t-he air delivery leg 3, whereby the airentering the upper end of said'down-duct 4 is drawn downwardly, passesthrough the port 5 to become mixed with the gas esca ing from the nipple7 into the mixing upuct 2. It will be perceived that by the describedconstruction I am enabled -to readily secure the proper mixture of asand air, provided only that the orifice 1n the nipple 7 and the ducts 2and 4 are made of the proper proportionate sizes; and further perceivedthat,

owing to the air delivery duct 4 being vertical, open at its upper end,and communieating at its lower end with the u -duct of the mixer leg,there is a column o air constantly present in said down-duct which isnot affected by atmospheric conditions exterior of the mixing device,hence there is no opportunity for fluctuations in the supply of airdelivered to the mixing duct. Furthermore the constant column of air inthe air delivery down-duct, present 1in said duct under externalatmospheric pressure, acts to resist a descending flow of as and airmixture from the burner throug the downduct in the mixer leg, and as aconsequence back ring from the burner to the mixing duct is avoided.

I claim:

1. A gas and air mixer having an up-duct communicable at its u per endwith a burner, having an air elivery down-duct open to the atmosphere atits upper end and n corr municating with the lower end of said fullyopen to the atmosphere at its upper end and communicating with the lowerend of said up-duct, and means for delivering gas into said 11p-duct,said gas delivering means being arranged to discharge gas into said11p-duct at a point above the point of communication between the lowerends of said ducts, the said legs being closed and integrally connectedtogether at their lower ends, -and a wall common to bot-l1 of said legsbeing formed between Asaid integrally connected legs. Y l

3. A gas and air mixer comprising a'mixing leg having a screw threadedupper end adapted to be connected to a burner, the said mixing leghaving an 11p-duct therein,

an air delivery leg integrally connected at its lower end to the lowerend of said mixing leg, said integrally connected legs being W. BMOSORLEY. In the presence of- E. CLARK, E. B. LINN.

